1. Functionality and Features

One of the significant factors influencing the price of delay relay timer modules is the range of features and functionalities they offer. Basic delay relay timers that simply control on/off delays are generally more affordable than multifunctional units, which may offer a variety of timing modes such as ON delay, OFF delay, interval delay, and pulse generation. Additionally, more advanced models that include features like programmable settings, digital displays, multiple time range adjustments, or remote control capabilities will typically command a higher price due to their added complexity and versatility.

2. Voltage and Current Ratings

The voltage and current ratings of the timer relay module are another key factor in determining its price. Modules designed to handle higher voltages (e.g., 24V, 48V, or even 110V) or larger current loads will generally be more expensive due to the need for more robust components, better insulation, and greater overall durability. For instance, industrial-grade modules used in high-power applications will be more costly than those designed for low-voltage, low-current systems.

3. Build Quality and Durability

Modules built for industrial applications or harsh environments will typically be more expensive due to the materials and components used to ensure longevity and reliability. These modules often feature weather-resistant enclosures, high-temperature tolerance, and shock-proof designs. High-quality components, such as precision resistors, capacitors, and relays, also add to the cost. Conversely, modules used in residential or light-duty applications may not require such high standards and are priced accordingly.